Double-pull automatic lock slider



y 1947- F. uLRlcHm-A 2,423,210

DOUBLE-PULL AUTOMATIC LOCK SLIDER Filed May 1, 1945 2 Sheets-Sheet 1 INVENTORS FREDERCK ULRICH I y orro SCHEUERMANN ATTORNEY-'5 July 1947- F. ULRICH ETAL 2,423,210

DOUBLE-PULL AUTOMATIC LOCK SLII JER Filed lay 1, 1945 Sheets-Sheet 2 Patented July 1, 1947 DOUBLE-PULL AUTOMATIC LOCK SLIDER' Frederick Ulrich, Jersey City, and Otto Scheu'ermann, Westfleld, .N.' J., assignors to Conmar Products Corporation, Newark, N. 1., a corpora- -tion of New Jersey Application May 1, 1945, Serial No. 591,348

This invention relates to an automatic lock slider for slide fasteners.

The invention is directed more particularly to an improved automatic lock slider of the socalled double-pull or double-acting type, such type comprising a lock slider having a pull device on each side thereof (front and rearifso thatthe locking member may be moved to unlocking po sition by operation of either pull device.

The rime object of our present invention centers about the provision of an improved doubleacting automatic lock slider for slide fasteners which is simple in construction, rugged in character, positive in action and capable of rapid manufacturing and assembling operations.

To the accomplishment of this main object and such other objects as may hereinafter appear, our invention relates to a double-pull or doubleacting automatic locking slider for slide fasteners as sought" to be defined in theappended claims and as described in the following specification taken together with the annexed drawings in which: i

Fig. 1 is a front plan view of the slider embodying the principles of the present invention;

Fig. 2 is a cross-sectional view taken in the planes of the broken line 2-2 of Fig. 1;

Fig. 3 is a rear plan view thereof, but showing the rear pull in a position different from that of Fig. 2;

Fig. 4 is a fragmentary section taken in the plane of the line 44 of Fig. 2;

Fig. 5 is a detail showing the locking member of the slider of Figs. 1 to 3 in an end View;

Fig. 6 is a View explanatory of the assembly of the slider body and locking member; and

Fig. 7 and Fig. 8 are views illustrating the actuation of the slider by means of the front pull and rear pull, respectively.

Referring now more in detail to the drawings and having reference first to Figs. 1 to 3 thereof, the double-pull or double-acting automatic lock slider of the present invention comprises a slider body generally designated as B haying front and rear wings l0 and I2 joined at their upper ends by a neck or so-called "diamond l4, 9. U -shaped locking member generally designated as L longitudinally straddling the wings of the slider and fulcrumed to the slider body at the point I, the said locking member L being active automatically for locking the slider to the elements illustrated by the fastener element-e (Fig. 2) of slide fastener stringers with which the slider is used, a pull device p on one side of the slider operative on one branch and a pull device p on the other 9 ('Jlaims. (Cl. 24-2055) side of the slider operative on the other branch of the said U-s'haped locking member L for moving the locking member about its said fulcrum f to unlocking position.

The slider body B, besides its conventional shape by which the front and rear wings l0 and l2 and the connecting neck .14 define interiorly a Y-shaped slider channel for the mating slide fastener stringers and besides having an orifice I6 in its front wing for the locking tooth of the locking member L, is in the preferred embodiment of the present invention formed at its neck it with a medially arranged external recess l8; and the rear wing l2 of the slider body is formed with a lower lug 20 and two upper spaced lugs .22 adapted to receive and upon which is mounted a closure cap 24 which latter may be secured onto these lugs in any desired way. The front wing I0 is also preferably provided with the outwardly extending spaced lugs 26, 26 to serve as the bearings for the fulcrum f. In the form of the invention exemplified, the body B is a die cast unit.

The locking member L, which in the form selected for illustration is a sheet metal piece, is generally U-shaped and comprises a front branch 28, a rear branch 30 and a connecting piece 32, one of these branches such as the front branch 28 beingformed with a locking tooth 34 which protrudes through the front wing-orifice it; into the slider channel for locking engagement with a slide fastener element such as the element e (see Fig. 2) As heretofore stated, the U-shaped locking member L is fulcrumed at one point on the slider body and this fulcrum is preferably taken at the neck of the slider. The locking member L forms a rigid part or piece pivoted at the fulcrum f to the spaced lugs 26, 2B projecting from the neck proper It. The locking member Lis fulcrumed to the slider body B by means of the pivot pin 36 which is received in aligned bearing holes in the lugs 26, 26 and a bore in the locking-member. This latter is best shown in Figs. 1 and 2 of the drawings from which it will be also seen that the connecting piece 32 of the lockingmember L is thereby lodged in the recess l8 formed at branch of the locking member for moving the locking member about itsfulcrum f to slider looking position.

The front and rear pull devices p and p are each slidably movable in slider opening and closing directions for positively moving the lockin member in each instance to its unlocking position. This is preferably accomplished by the provision in each of the branches 28 and 30 of the locking member L of oppositely directed cam faces against which the trunnions of the pull devices are active in their slider opening and closing operations. Thus the front branch 28 of the locking member is formed with the oppositely directed cam faces and 44, and the trunnions (or cross bar) 46 of the pull device 11 are lodged between these cam faces and the front slider wing 10. The rear branch 30 of the locking member is formed with the oppositely directed cam faces 48 and 50; and the trunnions (or cross bar) 52 of the pull device p are lodged between these cam faces and the slider cap 24,.the slider cap being formed with suitable apertures, for these trunnions. With this recited construction, it will be evident that slidable movement of the pull p in either the opening or closing direction and similar slidable movement of the pull device p in either the opening or closing direction will positively move the locking member L about its fulcrum or pivot against the action of the spring 38 to unlocking position.

This operation of the slider will be clear from a consideration of Figs. 7 and 8 of the drawings. In moving the slider by means of the front pull as either in the opening direction (full line position of the pull) or in the closing direction (the dot and dash line position of the pull), the pull operates upon the respective cam surfaces 42 and 44 of the locking member and cams the locking member out of the locking position of Fig. 2 into the unlocking position of Fig. 7 and moves the locking tooth 34 out of engagement with the slide fastener elements. This is accomplished against The structure, the mode of operation, the manthe action of the spring 38 acting on the rear branch 30 of the locking member. As soon as the front pull is released, the spring resumes its deenergized shape and moves the locking member about its fulcrum to its locking position. In Fig. 8 the slider is shown actuated by the rear pull p. The full line position of the pull illustrates the action of the pull on the slider in opening direction and the dot and dash line position illustrates the action of the pull on the slider in closing direction, the pull operating upon the respective cam surfaces 48 and 50 to cam the locking memher out of the locking position of Fig. 2 into the unlocking position of Fig. 8. Again when the rear pull 'p' is released, the spring 38 acts to move the locking member L back to the locking position shown in Fig. 2.

Fig. 6 is intended to illustrate the simple mode of assembling the slider body B and the locking member L. The locking member L is moved into straddling position longitudinally over the slider body B from a starting position I through an assumed intermediate position II through a final position III. The front pull p may be inserted into position as the locking member L is moved from position II to position III. The rear pull p is assembled to the slider body before the attachment to the body of the cap 24. Where the front pull is provided with open end trunnions (instead of closed end trunnions to form a cros bar as shown in Fig. 3), the front pull may, of course, be attached in position after the locking member has been assembled to the slider body.

tages from manufacturing and use standpoints of the automatic lock slider of the present invention will in the main be fully apparent from the above detailed description thereof. For a double-actin slider the device is simple in construction. The locking member L and the slider body B may be quickly assembled after the manner shown in Fig. 6 of the drawings. The rear pull and cap may then be quickly attached and the slider thus completed. Operation of either the front pull or the rear pull in either the opening or closing direction of the slider effects the positive movement of the locking member to its unlocking position. Release of either pull causes the locking member to be automatically moved to its locking position. The device is rugged in character and positive in action. The parts are, moreover, so inter-nested as to produce a desirably small slider unit.

It will be apparent that many changes may be made in the construction described without departing from the principle of the invention as defined in the following claims.

We claim:

1. A double-pull automatic lock slider for slide fasteners comprising a slider body having front and rear wings joined at their upper ends by a neck, a U-shaped locking member longitudinally straddling the wings of the slider and fulcrumed to the slider at its neck, a spring active on the rear branch of said U-shaped locking member for moving the same about its said fulcrum to locking position, and a pull on one side of said slider operative on one branch and a pull on the other side of said slider operative on the other branch of said U-shaped locking member for moving the same about its said fulcrum against the action of said spring to unlocking position.

2. A double-pull automatic lock slider for slide fasteners comprising a slider body having front and rear wings joined at their upper ends by a neck, a U-shaped locking member longitudinally straddling the wings of the slider and fulcrumed to the slider at its neck, means active on said locking member for moving the same about its said fulcrum to locking position, a pull on one side of said slider slidably movable in slider opening and closing directions for positively moving one branch, and a pull on the other side of said slider also slidably movable in slider opening and closing directions for positively moving the other branch, of said U-shaped locking member for moving the latter about its said fulcrum to unlocking position.

3. A double-pull automatic lock slider for slide fasteners comprising a slider body having front and rear wings joined at their upper ends by a neck, a U-shaped locking member longitudinally straddling the wings of the slider and fulcrumed to the slider at its neck, a spring active on the rear branch of said U-shaped locking member for moving the same about its said fulcrum to looking position, a, pull on one side of said slider slidably movable in slider opening and closing directions for positively moving one branch, and a pull on the other side of said slider also slidably movable in slider opening and closing directions for positively moving the other branch, of said U-shaped locking member for moving the latter about its said fulcrum to unlocking position.

4. The double-pull automatic lock slider of claim 2 in which each branch of the U-shaped locking member is formed with oppositely directed cam faces against which said pulls are active in their slider opening and closing operations.

5. A double-pull automatic lock slider for slide fasteners comprising-a slider body having front and rear wings Joined at their upper ends by a neck, a rigid U-shaped locking member longitudinally straddling the wings of the slider and fulcrumed at one point to the slider, means active on said locking member for moving the same about its said fulcrum to locking position, and a pull on one side of said slider operative on one branch and a pull on the other side of said slider operative on the other branch of said U-shaped locking member for moving the same about its said fulcrum to unlocking position.

6. The double-pull automatic lock slider of claim in which the said neck is provided with an external recess at its top and the piece connecting the branches of the U-shaped locking member is lodged in said recess.

'1. A double-pull automatic lock, slider for slide fasteners comprising a slider body havingfront and rear wings joined at their upper ends by a necir, a U-shaped locking member longitudinally straddling the wings of the slider and iulcrumed at one point to the slider, a cap secured to the rea wing of the slider body and housing the rear branch of said locking member, means active on-said locking member for moving the same about its said fulcrum to locking position, a pull on the front side of said slider active between the front wing and the front branch of said locking member for moving the loom ng member about its said fulcrum to unlocmng position, and a pull on the rear side of said slider active between said cap and the rear branch of said locking member for moving the looming member about its said fulcrum to unlocking position.

8. The double-pull automatic'lock slider of claim 7 in which each branch of the U-shaped locking member is formed with oppositely directed cam faces against which said pulls are.

active.

9. A double-pull automatic lock sliderfor slid fasteners comprising a slider body having front and rear wings joined at their upper ends by a neck, said neck having an external recess at its top, a U-shaped locking member longitudinally straddling the wings of the slider with its connecting piece lodged in the recess of said neck fulcrumed to the slider at its neck, a cap secured to the rear wing of the slider body and housing the rear branch of said locking member, a spring active on the rear branch of said locking member for moving the locking member about its said fulcrum to locking position, a pull on the front side of said, slider slidably active between the front wing and the front branch of said locking member for positively moving the looking member about its said fulcrum to unlocking position, and a pull on the rea side of said slider slidably active between said cap and the rear branch of said locking member for positively moving the locking member about its said fulcrum to unlocking position.

O'ITO SCHEUEBLMNN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PA'I'ENTS Number Name Date 2,018,948 Corner Oct. 29, 1935 

